In an email header, which entity represents the email's first origin?

In an email header, which entity represents the email's first origin?

• A. Somedomain.com
• B. Smtp1.somedomain.com
• C. Simon1.state.ok.gov.us
• D. David1.state.ok.gov.us

Answer: (C)

In an email header, the path a message takes is recorded by a chain of Received lines, with the most recent hop at the top and the original sender’s system at the bottom. The first origin is the bottom-most Received line—the origin that first created or handed the message to the internet. In this header, that origin is Simon1.state.ok.gov.us, which is the originating mail transfer agent. The other hostnames represent subsequent hops along the delivery path and are not the true origin of the message. So the first origin is the originating MTA, shown as Simon1.state.ok.gov.us.

In an email header, the path a message takes is recorded by a chain of Received lines, with the most recent hop at the top and the original sender’s system at the bottom. The first origin is the bottom-most Received line—the origin that first created or handed the message to the internet. In this header, that origin is Simon1.state.ok.gov.us, which is the originating mail transfer agent. The other hostnames represent subsequent hops along the delivery path and are not the true origin of the message. So the first origin is the originating MTA, shown as Simon1.state.ok.gov.us.